Your facial expression, your posture, the way you move, you lack of eye contact, the way you seem completely disinterested in your surroundings. All traits shared by someone who's on his way to do something both important and secretive, and mystery as we both know, breeds curiosity.

[As he tallied off Squall's traits and mannerisms, he kept his tone casual; he wasn't trying to insult Squall after all, these were just some casual observations he'd picked up over the years.]

Also the jacket. People who wear Leather usually do so for its durability; something indicative of an active and interesting life.